This week vaping, and the potential hidden health costs, go under the microscope as we also explore whether teens that would never smoke are being seduced by eCigarettes. Also, news of period impacts of the Covid-19 vaccines, woodpeckers and brain damage, signs that CRISPR could destabilise chromosomes, and a "wheely" good way to recycle old tyres... Like this podcast? Please help us by supporting the Naked Scientists